Dear moneu: It is believed that metastasis can occur both through the lymphatic system and through the bloodstream. The probability of metastasis increases based on the stage of the disease and some other prognositic factors. You would likely benefit from a discussion with your oncologist who can give you the statistics regarding the possibility of recurrence. Keep in mind that chemotherapy and hormone therapy are designed to reduce the risk of recurrence. You may also wish to discuss with your oncologist the value of tamoxifen for your situation.